76 lines
2.5 KiB
Java
76 lines
2.5 KiB
Java
/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8024500 8166446
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* @run testng SingletonIterator
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*/
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.NoSuchElementException;
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import java.util.concurrent.atomic.AtomicInteger;
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import org.testng.annotations.Test;
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import static org.testng.Assert.assertEquals;
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import static org.testng.Assert.assertFalse;
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import static org.testng.Assert.fail;
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@Test(groups = "unit")
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public class SingletonIterator {
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static void assertIteratorExhausted(Iterator<?> it) {
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assertFalse(it.hasNext());
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try {
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it.next();
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fail("should have thrown NoSuchElementException");
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} catch (NoSuchElementException success) { }
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it.forEachRemaining(e -> { throw new AssertionError("action called incorrectly"); });
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}
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public void testForEachRemaining() {
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Iterator<String> it = Collections.singleton("TheOne").iterator();
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AtomicInteger cnt = new AtomicInteger(0);
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it.forEachRemaining(s -> {
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assertEquals("TheOne", s);
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cnt.incrementAndGet();
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});
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assertEquals(cnt.get(), 1);
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assertIteratorExhausted(it);
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}
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static class SingletonException extends RuntimeException { }
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public void testThrowFromForEachRemaining() {
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Iterator<String> it = Collections.singleton("TheOne").iterator();
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try {
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it.forEachRemaining(s -> { throw new SingletonException(); });
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} catch (SingletonException ignore) { }
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assertIteratorExhausted(it);
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}
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}
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